NetCLI vs Subnet Driller

NetCLI is your portable Cisco networking lab. Build custom network topologies from scratch, connect routers and switches, and configure devices in a realistic IOS terminal. Practice subnetting, VLSM, IPv6, quizzes, and guided troubleshooting — all in one interactive app. Learn by doing with hands-on labs, a searchable Cisco command library, and real-time network behavior. NetCLI is built for CCNA students, Network+ learners, aspiring network engineers, and IT professionals who want practical CLI experience without physical hardware. KEY FEATURES • Dynamic Custom Labs: Drag and drop routers and switches onto a canvas, connect them with cables, and configure them in real time. NetCLI even automatically detects straight-through vs. crossover cables. • Full Terminal Simulator: Experience a realistic Cisco IOS command line with syntax highlighting, do command support, and advanced output filtering (| include). • Guided Troubleshooting Labs: Break and fix networks! Solve real-world issues like VLAN mismatches, DHCP failures, ACL misconfigurations, and routing loops using a structured, OSI-based debugging approach. • Cisco Command Library: Quickly search through over 200+ core commands, all directly linked to practical lab scenarios. INTERACTIVE TRAINERS & QUIZZES • Subnetting Practice: Master IPv4 subnetting at your own pace with four difficulty levels: Easy, Normal, Hard, and the brutal Nightmare mode. • VLSM Trainer: Learn Variable Length Subnet Masking step-by-step with guided, intuitive exercises. • IPv6 Trainer: Build rock-solid confidence in IPv6 addressing and subnetting. • Comprehensive Quizzes: Test your knowledge on everything from basic networking concepts and cabling to advanced Cisco IOS configurations. BRINGING THEORY TO LIFE NetCLI bridges the gap between textbook knowledge and real-world execution. Instead of just memorizing commands for an exam, you get to experiment safely, troubleshoot active configurations, and instantly see how a network responds to your input—all from a single, responsive app. Download NetCLI and start building real networking skills.

An offline subnetting quiz for CCNA, Network+, and other certification candidates. Questions are randomly generated, answers are deterministic, and every calculation is hand-verified. It drills the "magic number" / block-size method I memorized before my own exams: built for speed and repetition. Features: - Built-in block-size ("magic number") reference, one tap away - Five question types: network address, broadcast, first and last usable host, usable host count - Multiple choice or written answers - or a mix of both - SESSION and TOTAL counters, plus a per-type accuracy breakdown - Optional daily practice reminder - Fully offline - no accounts, ads, tracking, or subscriptions - Shamelessly vibe coded using Fable 5; the subnet math lives in its own package and is hand-verified for accuracy About me: I'm a working network engineer and active CCNA, living in Arizona, USA. Questions, feedback, or bug reports? I read and reply to every email personally. Subnet Driller is an independent study tool, not affiliated with, endorsed by, or sponsored by Cisco Systems, Inc. or CompTIA, Inc. CCNA and Network+ are trademarks of their respective owners.